APA (7th ed.) Citation

Lehár, F., & Gast, G. (1912). Selection from the operetta "Eva". G. Schirmer.

Chicago Style (17th ed.) Citation

Lehár, Franz, and G. Gast. Selection from the Operetta "Eva". Leipzig: G. Schirmer, 1912.

MLA (9th ed.) Citation

Lehár, Franz, and G. Gast. Selection from the Operetta "Eva". G. Schirmer, 1912.